Use AbstractString instead of String in most methods

Author: staticfloat

src/Abstract/DynamicLink.jl

@@ -146,7 +146,7 @@ default library search paths.  This method takes the given `soname` and joins
 it to the end of every path within the given `RPath`, returning the resultant
 path if it exists, returning back the original `soname` if it doesn't.
 """
-function find_library(rpath::RPath, soname::String)
+function find_library(rpath::RPath, soname::AbstractString)
     for path in canonical_rpaths(rpath)
         libpath = joinpath(path, soname)
         if isfile(libpath)

src/Abstract/ObjectHandle.jl

@@ -368,7 +368,7 @@ Return the absolute path to the given `soname`, using the linker search path
 that the given `ObjectHandle` would use at runtime.  See the documentation for
 `find_library(::RPath, ::String)` for more details.
 """
-function find_library(oh::ObjectHandle, soname::String)
+function find_library(oh::ObjectHandle, soname::AbstractString)
     return find_library(RPath(oh), soname)
 end
 
@@ -392,4 +392,4 @@ function find_libraries(oh::ObjectHandle)
     end
 
     return Dict(s => find_library(oh, strip_rpath(s)) for s in sonames)
-end
+end

src/Abstract/Section.jl

@@ -74,7 +74,7 @@ end
 
 Return a list of sections that match the given `name`.
 """
-function find(sections::Sections, name::String)
+function find(sections::Sections, name::AbstractString)
     return find(sections, [name])
 end
 
@@ -83,7 +83,7 @@ end
 
 Return a list of sections that match one of the given `names`.
 """
-function find(sections::Sections, names::Vector{String})
+function find(sections::Sections, names::Vector{S}) where {S <: AbstractString}
     return [s for s in sections if section_name(s) in names]
 end
 
@@ -92,7 +92,7 @@ end
 
 Return the first section that matches the given `name`.
 """
-function findfirst(sections::Sections, name::String)
+function findfirst(sections::Sections, name::AbstractString)
     return findfirst(sections, [name])
 end
 
@@ -348,4 +348,4 @@ function show(io::IO, s::Union{Section{H},SectionRef{H}}) where {H <: ObjectHand
     end
 end
 
-show(io::IO, sects::Sections{H}) where {H <: ObjectHandle} = show_collection(io, sects, H)
+show(io::IO, sects::Sections{H}) where {H <: ObjectHandle} = show_collection(io, sects, H)