Fix to MANPATH

This is a fix for fish so that the MANPATH will be a
':' delimited string instead of an array (expands to
words separated by spaces).  If this is not colon-delimited,
then the /etc/manpath.config is not sourced, (and) man
may not use all of the paths in MANPATH when looking for files.
Append PERLBREW_MANPATH with delimiter for fish
Merge remote-tracking branch 'upstream/develop' into issues-410
use more idiomatic bash code
implement purify in pure bash for speed
Merge pull request #415 from ap/harder-faster-bash

Speed up bashrc startup
Merge pull request #413 from elderling/issues-410

Updated do_install_this() to unlink the .version file if it exists.
Merge pull request #412 from singularperturbation/develop

Fix to MANPATH
Description: fix a spelling mistake

Apply the patch provided by https://rt.cpan.org/Public/Bug/Display.html?id=99256

Signed-off-by: Kang-min Liu <gugod@gugod.org>
Merge branch 'develop' of https://github.com/gugod/App-perlbrew into develop