Fewer shared examples for ARGF/Array/Complex/Data/Dir/Encoding

[Earlopain]

Working my way through these. #1364

Before:
3804 files, 35682 examples, 278464 expectations, 0 failure, 0 errors, 0 tagged

After:
3805 files, 35512 examples, 292300 expectations, 0 failure, 0 errors, 0 tagged

170 fewer specs.

[Copilot]

Pull request overview

Continues the project of replacing one-method shared examples with direct alias equality checks (per issue #1364). Behavior specs are moved into the canonical method's spec file, and alias spec files now assert Method#==/UnboundMethod#== against the canonical method. Net effect: 170 fewer examples, but more expectations and equivalent coverage.

Changes:

• Inlined shared example bodies into canonical spec files for ARGF, Array, Complex, Data, Dir, and Encoding.
• Replaced shared-example invocations in alias spec files with Method#==/UnboundMethod#== assertions; added a new ARGF#inspect alias spec.
• Deleted the corresponding now-unused shared/ files.

Reviewed changes

Copilot reviewed 90 out of 90 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
core/argf/{readlines,pos,fileno,filename,eof,each_line,each_byte,each_char,each_codepoint}_spec.rb	Inlined canonical behavior from shared specs.
core/argf/{to_a,to_i,tell,path,each,inspect}_spec.rb	Replaced shared spec with alias equality check (inspect_spec.rb is new).
core/argf/shared/{readlines,pos,fileno,filename,eof,each_line,each_byte,each_char,each_codepoint}.rb	Removed.
core/array/{collect,find_index,inspect,join,length,push,replace,select,unshift,element_reference}_spec.rb	Inlined canonical behavior.
core/array/{append,filter,index,map,prepend,size,slice,to_s}_spec.rb	Replaced shared specs with alias checks.
core/array/shared/{collect,index,inspect,join (partial),length,push,replace,select,slice,unshift}.rb	Removed (join still keeps array_join_with_string_separator).
core/complex/{abs,arg,conjugate,divide,imaginary,rectangular}_spec.rb	Inlined canonical behavior.
core/complex/{angle,conj,imag,magnitude,phase,quo,rect}_spec.rb	Replaced shared specs with alias checks.
core/complex/shared/{abs,arg,conjugate,divide,image,rect}.rb	Removed.
core/data/inspect_spec.rb, core/data/to_s_spec.rb, core/data/shared/inspect.rb	Behavior moved to inspect_spec.rb; to_s_spec.rb now alias-checks; shared file removed.
core/dir/{tell,path,pwd,open,exist}_spec.rb	Inlined canonical behavior.
core/dir/{to_path,pos,getwd}_spec.rb	Replaced shared specs with alias checks.
core/dir/shared/{exist,open,path,pwd}.rb, core/dir/shared/pos.rb	Removed (pos keeps dir_pos_set).
core/encoding/name_spec.rb, core/encoding/to_s_spec.rb, core/encoding/shared/name.rb	Behavior inlined into name_spec.rb; to_s_spec.rb alias-checks; shared file removed.

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[eregon]

Great!

Do you do these manually with some search/replace or you have some script or something?

[Copilot]

Pull request overview

Copilot reviewed 90 out of 90 changed files in this pull request and generated no new comments.

[Earlopain]

Do you do these manually with some search/replace or you have some script or something?

Nah, it's pretty manual. Seach and replace works ok, just do it twice (once for no arguments, and once with to take
care of the different ) position).

I wanted to use RDoc to tell me what are aliases but it actually doesn't show for class methods, that's a bit annoying. But I check all the shared examples anyways because there are some that are only used once for historic reasons (like being aliased in the past but it got removed).

Surely it can be done in a better way but I'll be done with this soon anways.