v2.2.0

Add -e flag to set sequence for escaping single quotes

Rationale: Some shells, like rc, don't support using backslash escapes
outside of a quoted string. In order for shsub to support such shells
without caveats, it is useful to specify an alternative escape sequence for
single quotes.

Ref:
https://doc.cat-v.org/plan_9/4th_edition/papers/rc
https://github.com/rakitzis/rc

@quexxon

v2.1.2

• Better error reporting

v2.1.1

• Minor improvement
• Documentation updating

v2.1.0

• Support template comments (<%!)
• Eliminate all dynamic allocation

v2.0.1

Fix known issues.
Thank Chris Wellons's review.

v2.0.0

This is a breaking upgrade and is incompatible with 1.x.

• Rewrite with plain C
• Build to a standalone executable instead of multiple ones
• Faster template compiling
• Support including other templates by <%+, %>
• The special treatment for shebang comments is deprecated; If an executable is required, compile the template to a shell script using the -c option
• Expressions are no longer automatically quoted and escaped
• The progname environment variable is no longer set; If the template needs to use $0, compile it to a shell script using the -c option

v1.4.2

fix bugs:

• if the template contains the shebang comment line, the line number reported by shsub is 1-shifted

v1.4.1

update documentation

v1.4.0

add:

• read from stdin if the file name is -

fix:

• minor bugs

v1.3.0

added features:

• set the progname variable if the template is a named file

fixed:

• minor bugs