GROOVY-5898: Sql.java throws IllegalStateException when comments contain quotes
fix handling of unterminated quote at end of string
Merge pull request #212 from jwagenleitner/GROOVY-5898

GROOVY-5898: Sql.java throws IllegalStateException when comments contain quotes
improve test robustness
improve build robustness
GROOVY-5898: fix for empty quotes
Merge pull request #213 from jwagenleitner/GROOVY-5898-fix

GROOVY-5898: fix for empty quotes
GROOVY-6217: The Edit command should replace the shell buffer, not append.
minimal refactoring after GROOVY-6217: updated copyright, use power asserts
remove unused files
GROOVY-6223: Inferred type is not stored on pre/postfix expressions