fixup! WIP: parse "Source:" from profile output with functions

tests/fixtures/duplicate_s_function.profile

@@ -1,67 +1,67 @@
 SCRIPT  tests/test_plugin/duplicate_s_function.vim
 Sourced 1 time
-Total time:   0.001189
- Self time:   0.000583
+Total time:   0.000600
+ Self time:   0.000278
 
 count  total (s)   self (s)
                             " https://github.com/vim/vim/issues/3286
-    1              0.000052 function! s:function(name) abort
+    1              0.000028 function! s:function(name) abort
                               echom a:name
                             endfunction
 
-    1   0.000367   0.000149 call s:function('name')
-    1   0.000691   0.000303 call test_plugin#function#function('name')
+    1   0.000132   0.000049 call s:function('name')
+    1   0.000390   0.000151 call test_plugin#function#function('name')
 
 SCRIPT  tests/test_plugin/autoload/test_plugin/function.vim
 Sourced 1 time
-Total time:   0.000099
- Self time:   0.000099
+Total time:   0.000054
+ Self time:   0.000054
 
 count  total (s)   self (s)
-    1              0.000036 function! s:function(name) abort
+    1              0.000016 function! s:function(name) abort
                               echom a:name
                             endfunction
 
-    1              0.000005 function! test_plugin#function#function(name) abort
+    1              0.000003 function! test_plugin#function#function(name) abort
                               call s:function(a:name)
                             endfunction
 
 FUNCTION  test_plugin#function#function()
-Called 1 time
-Total time:   0.000201
- Self time:   0.000036
     Source: tests/test_plugin/autoload/test_plugin/function.vim:5
+Called 1 time
+Total time:   0.000117
+ Self time:   0.000016
 
 count  total (s)   self (s)
-    1   0.000198   0.000033   call s:function(a:name)
+    1   0.000116   0.000015   call s:function(a:name)
 
 FUNCTION  <SNR>2_function()
-Called 1 time
-Total time:   0.000217
- Self time:   0.000217
     Source: tests/test_plugin/duplicate_s_function.vim:2
+Called 1 time
+Total time:   0.000082
+ Self time:   0.000082
 
 count  total (s)   self (s)
-    1              0.000200   echom a:name
+    1              0.000077   echom a:name
 
 FUNCTION  <SNR>3_function()
-Called 1 time
-Total time:   0.000165
- Self time:   0.000165
     Source: tests/test_plugin/autoload/test_plugin/function.vim:1
+Called 1 time
+Total time:   0.000101
+ Self time:   0.000101
 
 count  total (s)   self (s)
-    1              0.000163   echom a:name
+    1              0.000098   echom a:name
 
 FUNCTIONS SORTED ON TOTAL TIME
 count  total (s)   self (s)  function
-    1   0.000217             <SNR>2_function()
-    1   0.000201   0.000036  test_plugin#function#function()
-    1   0.000165             <SNR>3_function()
+    1   0.000117   0.000016  test_plugin#function#function()
+    1   0.000101             <SNR>3_function()
+    1   0.000082             <SNR>2_function()
 
 FUNCTIONS SORTED ON SELF TIME
 count  total (s)   self (s)  function
-    1              0.000217  <SNR>2_function()
-    1              0.000165  <SNR>3_function()
-    1   0.000201   0.000036  test_plugin#function#function()
+    1              0.000101  <SNR>3_function()
+    1              0.000082  <SNR>2_function()
+    1   0.000117   0.000016  test_plugin#function#function()