Turning `header` patterns into `signature` patterns in all syntax files
was a mistake. The two are different things. In almost all syntax files
those patterns are things like shebangs or <?xml ... ?> or
<!DOCTYPE html5> i.e. things that:
1. can be (and should be) used for detecting the filetype when there is
no `filename` match (and that is actually the purpose of those
patterns, so it's a regression that it doesn't work anymore).
2. should only occur in the first line of the file, not in the first
100 lines or so.
In other words, the old `header` semantics was exactly what was needed
for those filetypes, while the new `signature` semantics makes little
sense for them.
So replace `signature` back with `header` in most syntax files. Keep
`signature` only in C++ and Objective-C syntax files, for which it was
actually introduced.
Build pipelines for the Jenkins build system are configured in Groovy,
however since their filename is always `Jenkinsfile`, micro doesn't
recognize them as Groovy, and doesn't add syntax highlighting.
This small commit simply adds `Jenkinsfile` and `jenkinsfile` as file
names recognized as Groovy.
Odin is a general-purpose programming language with distinct typing,
built for high performance, modern systems, and built-in data-oriented
data types. The Odin Programming Language, the C alternative for
the joy of programming. The Data-Oriented Language for Sane Software
Development.
https://odin-lang.org/https://odin-lang.org/docs/overview/https://github.com/odin-lang/Odin
