Use exact message assertions in spawn error specs

Author: alessandro54

core/process/spawn_spec.rb

@@ -694,7 +694,7 @@ def child_pids(pid)
   end
 
   it "raises an Errno::ENOENT if the command does not exist" do
-    -> { Process.spawn "nonesuch" }.should raise_error(Errno::ENOENT, /No such file or directory.*nonesuch/)
+    -> { Process.spawn "nonesuch" }.should raise_error(Errno::ENOENT, "No such file or directory - nonesuch")
   end
 
   it "sets $? to exit status 127 when the command does not exist" do
@@ -703,7 +703,7 @@ def child_pids(pid)
   end
 
   it "raises an Errno::ENOENT if the file does not exist" do
-    -> { Process.spawn "./nonesuch" }.should raise_error(Errno::ENOENT, /No such file or directory.*nonesuch/)
+    -> { Process.spawn "./nonesuch" }.should raise_error(Errno::ENOENT, "No such file or directory - ./nonesuch")
   end
 
   it "sets $? to exit status 127 when the file does not exist" do
@@ -713,14 +713,14 @@ def child_pids(pid)
 
   platform_is_not :windows do
     it "raises an Errno::EACCES when the path is a directory" do
-      -> { Process.spawn "./" }.should raise_error(Errno::EACCES, /Permission denied/)
+      -> { Process.spawn "./" }.should raise_error(Errno::EACCES, "Permission denied - ./")
     end
   end
 
   unless File.executable?(__FILE__) # Some FS (e.g. vboxfs) locate all files executable
     platform_is_not :windows do
       it "raises an Errno::EACCES when the file does not have execute permissions" do
-        -> { Process.spawn __FILE__ }.should raise_error(Errno::EACCES, /Permission denied/)
+        -> { Process.spawn __FILE__ }.should raise_error(Errno::EACCES, "Permission denied - #{__FILE__}")
       end
 
       it "sets $? to exit status 127 when the file does not have execute permissions" do
@@ -736,7 +736,7 @@ def child_pids(pid)
           File.write("#{dir}/#{exe}", "#!/bin/sh\necho hi")
           File.chmod(0644, "#{dir}/#{exe}")
           env = { "PATH" => "#{dir}#{File::PATH_SEPARATOR}#{ENV['PATH']}" }
-          -> { Process.spawn(env, exe) }.should raise_error(Errno::ENOENT, /No such file or directory.*#{exe}/)
+          -> { Process.spawn(env, exe) }.should raise_error(Errno::ENOENT, "No such file or directory - #{exe}")
           $?.exitstatus.should == 127
         ensure
           rm_r dir