more small changes for trimming (#55255)

A few more unobjectionable, NFC changes from #55047.

Author: JeffBezanson

base/strings/io.jl

@@ -246,7 +246,7 @@ end
 
 # optimized methods to avoid iterating over chars
 write(io::IO, s::Union{String,SubString{String}}) =
-    GC.@preserve s Int(unsafe_write(io, pointer(s), reinterpret(UInt, sizeof(s))))::Int
+    GC.@preserve s (unsafe_write(io, pointer(s), reinterpret(UInt, sizeof(s))) % Int)::Int
 print(io::IO, s::Union{String,SubString{String}}) = (write(io, s); nothing)
 
 """

base/sysinfo.jl

@@ -165,7 +165,7 @@ end
 # without pulling in anything unnecessary like `CPU_NAME`
 function __init_build()
     global BINDIR = ccall(:jl_get_julia_bindir, Any, ())::String
-    vers = "v$(VERSION.major).$(VERSION.minor)"
+    vers = "v$(string(VERSION.major)).$(string(VERSION.minor))"
     global STDLIB = abspath(BINDIR, "..", "share", "julia", "stdlib", vers)
     nothing
 end

base/task.jl

@@ -813,6 +813,14 @@ macro sync_add(expr)
     end
 end
 
+throwto_repl_task(@nospecialize val) = throwto(getfield(active_repl_backend, :backend_task)::Task, val)
+
+function is_repl_running()
+    return isdefined(Base, :active_repl_backend) &&
+        (getfield(active_repl_backend, :backend_task)::Task)._state === task_state_runnable &&
+        getfield(active_repl_backend, :in_eval)
+end
+
 # runtime system hook called when a task finishes
 function task_done_hook(t::Task)
     # `finish_task` sets `sigatomic` before entering this function
@@ -834,10 +842,8 @@ function task_done_hook(t::Task)
     end
 
     if err && !handled && Threads.threadid() == 1
-        if isa(result, InterruptException) && active_repl_backend !== nothing &&
-            active_repl_backend.backend_task._state === task_state_runnable && isempty(Workqueue) &&
-            active_repl_backend.in_eval
-            throwto(active_repl_backend.backend_task, result) # this terminates the task
+        if isa(result, InterruptException) && isempty(Workqueue) && is_repl_running()
+            throwto_repl_task(result)
         end
     end
     # Clear sigatomic before waiting
@@ -848,11 +854,8 @@ function task_done_hook(t::Task)
         # If an InterruptException happens while blocked in the event loop, try handing
         # the exception to the REPL task since the current task is done.
         # issue #19467
-        if Threads.threadid() == 1 &&
-            isa(e, InterruptException) && active_repl_backend !== nothing &&
-            active_repl_backend.backend_task._state === task_state_runnable && isempty(Workqueue) &&
-            active_repl_backend.in_eval
-            throwto(active_repl_backend.backend_task, e)
+        if Threads.threadid() == 1 && isa(e, InterruptException) && isempty(Workqueue) && is_repl_running()
+            throwto_repl_task(e)
         else
             rethrow()
         end