Remove references to individual genders

Remove references to individual genders in comments/examples.  No
functional change.  For the rationale, cf.
https://chromium.googlesource.com/chromium/src/+/master/styleguide/gender_neutral_code.md

BUG=none
TEST=none

Change-Id: Ifbdb31c8e41b517bb7588df0e2c187db22ca580d
Reviewed-on: https://chromium-review.googlesource.com/517124
Commit-Ready: Thiemo Nagel <[email protected]>
Tested-by: Thiemo Nagel <[email protected]>
Reviewed-by: Luigi Semenzato <[email protected]>
diff --git a/file.m/execve.c b/file.m/execve.c
index 1d56ec2..2742faa 100644
--- a/file.m/execve.c
+++ b/file.m/execve.c
@@ -146,7 +146,7 @@
  *
  *     The result of mounting a filesystem nosuid  vary  between  Linux  kernel
  *     versions:  some will refuse execution of SUID/SGID executables when this
- *     would give the user powers she did not have already (and return  EPERM),
+ *     would give the user powers they did not have already (and return  EPERM),
  *     some will just ignore the SUID/SGID bits and exec successfully.
  *
  *     A maximum line length of 127 characters is allowed for the first line in