Here are a pile of 'code error' corrections I have accumulated over time. Few are mine, most are from generous people who have shared their efforts. Thanks to all of you.
Suggest you copy and paste into a new text file.
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FIND / REPLACE text (use with tags)
For a string of letters and numbers
([^>]+)(.*?)
eg.
<a name="Chapter_LIII" id="Chapter_LIII"></a>
<a([^>]+)(.*?)></a>
or
<body id="0-a5e9337bbdff40f4b38c8f20e5723a9a" class="calibre">
Find id="0-a5e9337bbdff40f4b38c8f20e5723a9a"
With id=([^>]+)(.*?) class
some text like, id=, then ([^>]+)(.*?) and then something to end string of letters & numbers
Find number in <b> in Regex mode
<b>[0-9]+</b>
Find Roman Numerals
lower or UPPER CASE
[xvi]+
[XVI]+ \>I[XVI]+
[1 space]
\[\s]
Find I, II, III
<p>[I]+</p>
Find Pg ### in Regex mode (?DotAll)
[P][g] (\d+)
[P][g] [xvi]+
Find Page_394 in Regex mode (?DotAll)
\Q"Page_\E(\d+)"
Find id="sigil_toc_id_3"
\Qid="sigil_toc_id_\E(\d+)"
[^\.] will match anything but . eg [^\.>]</
[,;:] will match any punctuation except period
[^,;:], where ^ stands for NOT in the character set.
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