使用 sed 问题运行 AppleScript 正则表达式

问：

我正在尝试在AppleScript下使用sed来执行正则表达式命令。目标是运行一系列正则表达式命令来清理文本。我尝试使用 TextEdit 应用程序作为要传递给正则表达式命令的数据源。在我注释掉查找孤立的“：”和“;”的两个表达式之前，它不会运行。

该脚本运行并且没有错误，但它也不会影响正则表达式通信应该处理的任何文本问题。我能做些什么来让它运行？我从没想过一些简单的文本 mungung 在 AppleScript 中会如此困难。

tell application "TextEdit" to activate

set the clipboard to ""
tell application "System Events" to keystroke "c" using command down -- copy
delay 1 -- test different values

set selectedText to the clipboard as Unicode text
if selectedText is "" then
    display dialog "Text selection not found"
    return
end if

-- Replace ".  " with ". "
set selectedText to do shell script "echo " & quoted form of selectedText & " | sed 's/\\.  /\\. /g'"

-- Replace "  " with " "
set selectedText to do shell script "echo " & quoted form of selectedText & " | sed 's/  / /g'"

-- Replace "   " with " "
set selectedText to do shell script "echo " & quoted form of selectedText & " | sed 's/   / /g'"

-- Replace ",  " with ", "
set selectedText to do shell script "echo " & quoted form of selectedText & " | sed 's/,  /, /g'"

-- Replace ":" without a space after with ": "
--set selectedText to do shell script "echo " & quoted form of selectedText & " | sed 's/:\([^[:space:]]\)/: \\1/g'"

-- Replace ";" without a space after with "; "
--set selectedText to do shell script "echo " & quoted form of selectedText & " | sed 's/;\([^[:space:]]\)/; \\1/g'"

-- Replace curly quotes with straight quotes
set selectedText to do shell script "echo " & quoted form of selectedText & " | sed 's/[“”‘’]/\"/g'"

-- Replace multiple carriage returns with one carriage return
set selectedText to do shell script "echo " & quoted form of selectedText & " | awk 'BEGIN{RS=\"\";FS=\"\\n\"}{for(i=1;i<=NF;i++)if($i)printf(\"%s%s\",$i,i==NF?\"\":\"\\n\")}'"

-- Replace repeated words with one occurrence of the word
set selectedText to do shell script "echo " & quoted form of selectedText & " | sed -E 's/(\\b\\w+\\b)(\\s+\\1)+/\\1/g'"

-- Capitalize the first letter after a period and lowercase the rest
set selectedText to do shell script "echo " & quoted form of selectedText & " | sed -E 's/\\b([a-z])|\\.\\s+(.)/\\U\\1\\L\\2/g'"

set the clipboard to selectedText
delay 1
tell application "System Events" to keystroke "v" using command down -- paste

我已经注释掉了两个阻止脚本运行的正则表达式命令，并且脚本将耗尽不返回任何内容。