make: provide more context information for parse/evaluate errors

make: replace 'variable expression' with 'expression' in diagnostics

tests/make: replace 'variable expression' with 'expression'

Each expression is based on a variable, there's no need for the
verbosity. The wording in make's diagnostics will be changed in a
follow-up commit.

tests/make: force line-based diagnostics to be listed in the tests

This way, contradictions between the intended output and the actual
output are closer together and have a better chance of being spotted.

make: improve error message for unclosed modifier

Replace "variable specification" with the more modern "variable
expression", reduce the number of parentheses, output more than a single
character for modifiers, make it obvious that in expressions such as
${:Serror}, the "" means a variable name.

make: add quotes around variable name in an error message

make: add test for confusing double space in error message

make(1): indent directives like .info, .if, .for consistently

Done by "pkglint -F *.mk", no manual corrections.

make(1): fixup for "Unfinished modifier"

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

make: replace 'variable expression' with 'expression' in diagnostics

tests/make: replace 'variable expression' with 'expression'

Each expression is based on a variable, there's no need for the
verbosity. The wording in make's diagnostics will be changed in a
follow-up commit.

tests/make: force line-based diagnostics to be listed in the tests

This way, contradictions between the intended output and the actual
output are closer together and have a better chance of being spotted.

make: improve error message for unclosed modifier

Replace "variable specification" with the more modern "variable
expression", reduce the number of parentheses, output more than a single
character for modifiers, make it obvious that in expressions such as
${:Serror}, the "" means a variable name.

make: add quotes around variable name in an error message

make: add test for confusing double space in error message

make(1): indent directives like .info, .if, .for consistently

Done by "pkglint -F *.mk", no manual corrections.

make(1): fixup for "Unfinished modifier"

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

tests/make: force line-based diagnostics to be listed in the tests

This way, contradictions between the intended output and the actual
output are closer together and have a better chance of being spotted.

make: improve error message for unclosed modifier

Replace "variable specification" with the more modern "variable
expression", reduce the number of parentheses, output more than a single
character for modifiers, make it obvious that in expressions such as
${:Serror}, the "" means a variable name.

make: add quotes around variable name in an error message

make: add test for confusing double space in error message

make(1): indent directives like .info, .if, .for consistently

Done by "pkglint -F *.mk", no manual corrections.

make(1): fixup for "Unfinished modifier"

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

make: improve error message for unclosed modifier

Replace "variable specification" with the more modern "variable
expression", reduce the number of parentheses, output more than a single
character for modifiers, make it obvious that in expressions such as
${:Serror}, the "" means a variable name.

make: add quotes around variable name in an error message

make: add test for confusing double space in error message

make(1): indent directives like .info, .if, .for consistently

Done by "pkglint -F *.mk", no manual corrections.

make(1): fixup for "Unfinished modifier"

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

make: add quotes around variable name in an error message

make: add test for confusing double space in error message

make(1): indent directives like .info, .if, .for consistently

Done by "pkglint -F *.mk", no manual corrections.

make(1): fixup for "Unfinished modifier"

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

make(1): indent directives like .info, .if, .for consistently

Done by "pkglint -F *.mk", no manual corrections.

make(1): fixup for "Unfinished modifier"

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

make(1): fixup for "Unfinished modifier"

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

make(1): improve output grouping in varmod-edge test

The generated error messages are now closer to the test cases that
produce them. To keep the expected output stable, the line numbers are
omitted from the .info directives.

make(1): add test for ${VAR::::}

It's a bit unrealistic, but at least there are good diagnostics.

make(1): add test for empty modifier list after colon

This is a good candidate for becoming an error in strict mode.
Either write ${VAR} or write ${VAR:modifiers}, but not half-baked.

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

make(1): rename VarGetPattern to ParseModifierPart

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

Adjust test for the new behavior: % on hls and no % on the rhs does not
prepend the lhs to the rhs.

branches: 1.6.4;
Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

Add more tests for variable modifiers in make.

Fix out-of-bounds read in Str_Match.

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N

Demonstrate some more edge cases for the :M modifier

Fix unit test for edge case in :M modifier

Add another unit test for the :M modifier

Add unit tests for variable modifiers like :M and :N