Suppress false-positive shellcheck warnings

CHANGELOG.md

@@ -19,6 +19,10 @@
 - A .sh.install_prefix var has been introduced to reflect the `meson -prefix=`
   value. This will be used to establish the location of supporting files such
   as man pages and autoloaded functions.
+- Cd related functions (e.g., cd, pushd, popd, nextd, prevd, mcd, dirs) are
+  automatically enabled. The code is based on the functions that used to be
+  found in src/cmd/ksh93/fun. In practice they were never used because most
+  distros never installed those files, and if installed no one knew about them.
 
 ## Other significant changes
 

src/cmd/ksh93/functions/cd

@@ -4,6 +4,7 @@
 # `cd -2` to cd to the second most recently visited directory.
 #
 # shellcheck disable=SC2102  # .sh.var refs are legal as an array index
+# shellcheck disable=SC2154  # .sh._push_stack[@] is referenced but not assigned
 # shellcheck disable=SC2211  # .sh.var assignments are not "glob used as a command name"
 
 function cd {

src/cmd/ksh93/functions/popd

@@ -1,5 +1,6 @@
 #!/usr/bin/env ksh
 # Pops the top directory
+# shellcheck disable=SC2154  # .sh._push_stack[@] is referenced but not assigned
 # shellcheck disable=SC2211  # .sh.var assignments are not "glob used as a command name"
 
 function popd {

src/cmd/ksh93/functions/pushd

@@ -1,6 +1,7 @@
 #!/usr/bin/env ksh
 # Change directory and put directory on front of stack
 # shellcheck disable=SC2102  # .sh.var refs are legal as an array index
+# shellcheck disable=SC2154  # .sh._push_stack[@] is referenced but not assigned
 # shellcheck disable=SC2211  # .sh.var assignments are not "glob used as a command name"
 
 function pushd {