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Makefile: Don't use `echo`'s `-e` option for portability.

Many systems (including Debian, Ubuntu and derivatives like Linux Mint) use
Dash as a noninteractive version of `/bin/sh`, invoked by `make`.

Dash's `echo` command doesn't understand the `-e` option and this generates
spurious output when running `make`.  See [a bugreport][0] for one of the
many instances of this bug/feature in action.

[0]: https://bugs.launchpad.net/ubuntu/+source/dash/+bug/72167
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1 parent 348486c commit 66e8777769ae1408dde499701e07e2bf2c598a21 @rbrito rbrito committed Dec 8, 2011
Showing with 4 additions and 2 deletions.
  1. +4 −2 Makefile
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@@ -10,9 +10,11 @@ update-readme:
header=$$(sed -e '/.*## OPTIONS/,$$ d' README.md) && \
footer=$$(sed -e '1,/.*## FAQ/ d' README.md) && \
echo "$${header}" > README.md && \
- echo -e '\n## OPTIONS' >> README.md && \
+ echo >> README.md && \
+ echo '## OPTIONS' >> README.md && \
echo "$${options}" >> README.md&& \
- echo -e '\n## FAQ' >> README.md && \
+ echo >> README.md && \
+ echo '## FAQ' >> README.md && \
echo "$${footer}" >> README.md
compile:

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