Update solc.py

Fixed a variable reference and corrected style.

Author: joevanloon

crytic_compile/platform/solc.py

@@ -627,12 +627,12 @@ def _run_solcs_path(
                 )
                 break
             except InvalidCompilation as ic:
-                compilation_errors.append(version_env+': '+ic.args[0])
+                compilation_errors.append(solc_bin + ': ' + ic.args[0])
                 pass
 
     if not targets_json:
         raise InvalidCompilation(
-            "Invalid solc compilation, none of the solc versions provided worked:\n"+'\n'.join(compilation_errors)
+            "Invalid solc compilation, none of the solc versions provided worked:\n" + '\n'.join(compilation_errors)
         )
 
     return targets_json
@@ -715,12 +715,12 @@ def _run_solcs_env(
                 )
                 break
             except InvalidCompilation as ic:
-                compilation_errors.append(version_env+': '+ic.args[0])
+                compilation_errors.append(version_env + ': ' + ic.args[0])
                 pass
 
     if not targets_json:
         raise InvalidCompilation(
-            "Invalid solc compilation, none of the solc versions provided worked:\n"+'\n'.join(compilation_errors)
+            "Invalid solc compilation, none of the solc versions provided worked:\n" + '\n'.join(compilation_errors)
         )
 
     return targets_json