Remove useless and non posix -e switch to awk invocations in rc scripts

Fixes #705

rc/base/ctags.kak

@@ -16,7 +16,7 @@ def -params 0..1 \
         export tagname=${1:-${kak_selection}}
         for tags in $(printf %s\\n "${kak_opt_ctagsfiles}" | tr ':' '\n'); do
             export tagroot="$(readlink -f $(dirname "$tags"))/"
-            readtags -t "${tags}" ${tagname} | awk -F '\t|\n' -e '
+            readtags -t "${tags}" ${tagname} | awk -F '\t|\n' '
             /[^\t]+\t[^\t]+\t\/\^.*\$?\// {
                 re=$0;
                 sub(".*\t/\\^", "", re); sub("\\$?/$", "", re); gsub("(\\{|\\}|\\\\E).*$", "", re);

rc/extra/clang.kak

@@ -42,7 +42,7 @@ def clang-parse -params 0..1 -docstring "Parse the contents of the current buffe
                 header="${kak_cursor_line}.${kak_cursor_column}@${kak_timestamp}"
                 compl=$(clang++ -x ${ft} -fsyntax-only ${kak_opt_clang_options} \
                     -Xclang -code-completion-brief-comments -Xclang -code-completion-at=${pos} - < ${dir}/buf 2> ${dir}/stderr |
-                        awk -F ': ' -e '
+                        awk -F ': ' '
                             /^COMPLETION:/ && ! /\(Hidden\)/ {
                                  id=$2
                                  gsub(/ +$/, "", id)

rc/extra/git-tools.kak

@@ -64,7 +64,7 @@ def -params 1.. \
                       try %{ addhl flag_lines GitBlame git_blame_flags }
                       set buffer=$kak_bufname git_blame_flags '$kak_timestamp'
                   }" | kak -p ${kak_session}
-                  git blame "$@" --incremental ${kak_buffile} | awk -e '
+                  git blame "$@" --incremental ${kak_buffile} | awk '
                   function send_flags(text, flag, i) {
                       if (line == "") { return; }
                       text=substr(sha,1,8) " " dates[sha] " " authors[sha]
@@ -94,7 +94,7 @@ def -params 1.. \
     }
 
     update_diff() {
-        git diff -U0 $kak_buffile | awk -e '
+        git diff -U0 $kak_buffile | awk '
             BEGIN {
                 line=0
                 flags=ENVIRON["kak_timestamp"]