docs: fix multipart regex example (#850)

Quick fix for docs issue.

Signed-off-by: Henry Schreiner <[email protected]>

Author: henryiii

docs/changelog.md

@@ -19,7 +19,7 @@ New features:
 * Add `if.failed` (retry) by @henryiii in #820
 * Packages can also be specified via a table by @henryiii in #841
 * Move `cmake.targets` and `cmake.verbose` to `build.targets` and `build.verbose` by @henryiii in #793
-* Support multipart regex by @henryiii in #818
+* Support multipart regex using `result=` by @henryiii in #818
 * Add `remove=` postprocess to regex by @henryiii in #828
 
 Fixes:

docs/configuration.md

@@ -615,10 +615,10 @@ matches from the final result. A more complex example:
 provider = "scikit_build_core.metadata.regex"
 input = "src/mypackage/version.hpp"
 regex = '''(?sx)
-\#define \w+ VERSION_MAJOR \w+ (?P<major>\d+) .*?
-\#define \w+ VERSION_MINOR \w+ (?P<minor>\d+) .*?
-\#define \w+ VERSION_PATCH \w+ (?P<patch>\d+) .*?
-\#define \w+ VERSION_DEV \w+ (?P<dev>\d+) .*?
+\#define \s+ VERSION_MAJOR \s+ (?P<major>\d+) .*?
+\#define \s+ VERSION_MINOR \s+ (?P<minor>\d+) .*?
+\#define \s+ VERSION_PATCH \s+ (?P<patch>\d+) .*?
+\#define \s+ VERSION_DEV   \s+ (?P<dev>\d+)   .*?
 '''
 result = "{major}.{minor}.{patch}dev{dev}"
 remove = "dev0"