Escape Characters Required In git-windows Batch File

[NathanielJS1541]

The --format argument for git log in the git-windows vc.bat file needs some extra escape characters for the % characters. As an example, the string %H%n is interpreted as the variable H followed by an n. Since the batch file does not set the variable H, %H% is replaced with nothing, leaving n.

Therefore, the following line of the batch file (before being piped to gawk)

git --no-pager log -1 HEAD --pretty=format:"Hash: %H%nAbr. Hash: %h%nParent Hashes: %P%nAbr. Parent Hashes: %p%nAuthor Name: %an%nAuthor Email: %ae%nAuthor Date: %ai%nCommitter Name: %cn%nCommitter Email: %ce%nCommitter Date: %ci%n"

outputs the following:

Hash: VariableHnAbr. Hash: VariableHnParent Hashes: nAbr. Parent Hashes: nAuthor Name: nAuthor Email: nAuthor Date: nCommitter Name: nCommitter Email: nCommitter Date: n

Escaping all of the % characters (resulting in them all being %%) will produce the following output for the line above (run on master of this repo):

Hash: 8c8e2eb5e1d924c2066a5dc3cbc31b452b40ab44
Abr. Hash: 8c8e2eb
Parent Hashes: c81b1aef231a51e761828cc4c87022b65014f3a4
Abr. Parent Hashes: c81b1ae
Author Name: Roland Hieber
Author Email: rohieb@rohieb.name
Author Date: 2020-01-23 18:21:28 +0100
Committer Name: Roland Hieber
Committer Email: rohieb@rohieb.name
Committer Date: 2020-01-23 18:21:29 +0100

There is still another issue with vc-git.awk, on Windows, but I'll address that in a separate issue (#3).