Regular Expressions 101

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`
(\w+)=([^=]*\w)(?:\s|$)
`
gm
1st Capturing Group
(\w+)
\w
matches any word character (equivalent to [a-zA-Z0-9_])
+ matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
2nd Capturing Group
([^=]*\w)
Match a single character not present in the list below
[^=]
* matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
= matches the character = with index 6110 (3D16 or 758) literally (case sensitive)
\w matches any word character (equivalent to [a-zA-Z0-9_])
Non-capturing group
(?:\s|$)
1st Alternative
\s
\s matches any whitespace character (equivalent to [\r\n\t\f\v ])
2nd Alternative
$
$ asserts position at the end of a line
Global pattern flags
g modifier: global. All matches (don't return after first match)
m modifier: multi line. Causes ^ and $ to match the begin/end of each line (not only begin/end of string)
Your regular expression does not match the subject string.

Regular Expression
No Match

`
`
gm

Test String