Consistently format ABNF rules for human readability

Use line length 75 to allow pasting the text file content into the OASIS word template using paragraph style Code (Courier New, 9pt) Format rules so that concatenation parts are vertically aligned, alternative parts are aligned with the / as leading character, aligned either under the = or the opening (, place the closing ) on a separate line aligned with its opening counterpart. Place all = signs at character position 30 (sufficient for current maximum rule name, which is quite long). Illustrated by the following example (use fixed-width font to view Rule = subrule / alternative-subrule Rule = subrule subrule2 subrule4 concatentated-subrule Rule = subrule ( alternative / alternative ( sub-alternative / sub-alternative ) )

https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/ABNF/odata-abnf-construction-rules-v1.0-wd01.txt?rev=60 https://tools.oasis-open.org/version-control/browse/wsvn/odata/trunk/spec/ABNF/odata-abnf-testcases.xml?rev=60 Accepted: https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47096/latest/odata_meeting-10_on-20121004-minutes.html