Minor fixes for regex

These problems were found as I transferred them to LFD121.

Signed-off-by: David A. Wheeler <[email protected]>

Author: david-a-wheeler

secure_software_development_fundamentals.md

@@ -1685,7 +1685,7 @@ The usual way to require a regex to match an entire input is to include *anchors
 
 **ca[brt]**
 
-In contrast, this regex will only match *exactly* the words “**cab**”, “**car**”, or “**cat**” in most regex implementations, because “**^**” often means *“match the beginning”* and “**$**” means *“match the end”*:
+In contrast, this regex will only match *exactly* the words “**cab**”, “**car**”, or “**cat**” in many regex implementations, because “**^**” often means *“match the beginning”* and “**$**” often means *“match the end”*:
 
 **^ca[brt]$**
 
@@ -1695,7 +1695,7 @@ In some implementations (depending on the option), “**^**” may mean *“begi
 
 Regex notations are *not* the same between different languages and libraries. Almost every programming language has at least one good regex implementation and they all share many features. However, they are slightly different.
 
-So, when you use a regex implementation you have not used before, look at its documentation every time you use an operation that you have not used before. Also, be careful when reusing a pattern.Here are some variations to look for.
+So, when you use a regex implementation you have not used before, look at its documentation every time you use an operation that you have not used before. Also, be careful when reusing a pattern. Here are some variations to look for.
 
 There are three major families of regex language notations:
 
@@ -1711,7 +1711,7 @@ There are three major families of regex language notations:
 
 * Sometimes “**^**” matches the beginning of all the data, while in others it represents the beginning of any line in the data. This is often controlled by a *multiline* option.
 
-* Sometimes “**$**” matches the end of all the data, while in others it represents the end of any line in the data. In some systems, an optional newline character (or similar) is also always accepted. In some systems you must use `\z` to match the end of the data, but in Python you must use `\Z`.
+* Sometimes “**$**” matches the end of all the data, while in others it represents the end of any line in the data. In some systems, an optional newline character (or similar) is also always accepted. In some systems you must use "**\z**" to match the end of the data, but in Python you must use "**\Z**".
 
 * The “**.**” for representing *“any character”* doesn’t always match the newline character (**\n**); often there is an option to turn this on or off.