RDE C runtime, rephrased two comments for clarity
Fixed bug in template used by critcl parser generator. Put exceptio tag _before_ the existing information. Do not drop the location information (char index).
Fixed "i_next_str" in the C runtime to match the Tcl runtime with regard to generated error locations. Plus fixed typo in a comment.
Fixed construction of error messages for str-operator in the cparam code generator to match the Tcl runtime (Removed single-quotes, and use operator t in the message). The last is iffy. Should modify Tcl runtimes instead. Updated the expected results in the testsuite.