#72 Added ability to suppress history substitution. Also fixed a related bug with use of freed memory for the prompt string and duplicate processing of the program name string.

[Jim Monte]

A new boolean variable no_histsubst was defined to suppress history substitution. Also, the handling of the prompt string was fixed if the prompt variable is deleted.

[Jim Monte]

See patch #79 for a missing variable required for suppressing history substitution.

[Jim Monte]

The patch, along with more efficient checking for "option variables" (variables that are used to set cp-* variables, such as noglob setting cp_noglob) and a potential access violation if the prompt was improperly set is available in branch beta_jdm . When updating from pre-master, there was a merge conflict that was also fixed along with some minor cleanup.

commit 0ad9565ba782695b037c58adfe9d9e4f0db3ed17
Merge: aee1304 dd05e24
Date: Thu Dec 5 16:19:21 2019 -0500

Fixed merge conflict. Also made readifile() static and removed an unnecessary string duplication there.

commit aee1304ad4ab179d95eabbf8c29f2458702740ac
Date: Thu Dec 5 14:38:57 2019 -0500

Added no_histsubst option and related fixes

Below is some testing

ngspice 1 -> echo a b c
a b c
ngspice 2 -> !!:s/a/z/
echo z b c
z b c
ngspice 3 -> set no_histsubst
ngspice 4 -> echo a b c
a b c
ngspice 5 -> !!:s/a/z/
!!:s/a/z/: no such command available in ngspice
ngspice 6 -> unset no_histsubst
ngspice 7 -> echo a b c
a b c
ngspice 8 -> !!:s/a/z/
echo z b c
z b c
ngspice 9 -> set a < 'D:\tmp.txt'
ngspice 10 -> echo $a
11 12 13 14 15 16