remove jumbled from format, fix broken version string, cast iso to in… (#22)

* remove jumbled from format, fix broken version string, cast iso to int header.

* remove jumbled from format...

* oops, left busted is_jumbled read.

Author: michelp

suitesparse_graphblas/io/binary.py

@@ -41,7 +41,6 @@ def readinto_new_buffer(f, typ, size, allocator=stdlib.malloc):
 size:    {size}
 type:    {type}
 iso:     {iso}
-jumbled: {jumbled}
 {comments}
 """
 
@@ -239,8 +238,8 @@ def binwrite(A, filename, comments=None, opener=Path.open):
 
     suitesparse_version = (
         f"v{lib.GxB_IMPLEMENTATION_MAJOR}."
-        "{lib.GxB_IMPLEMENTATION_MINOR}."
-        "{lib.GxB_IMPLEMENTATION_SUB}"
+        f"{lib.GxB_IMPLEMENTATION_MINOR}."
+        f"{lib.GxB_IMPLEMENTATION_SUB}"
     )
 
     vars = dict(
@@ -253,8 +252,7 @@ def binwrite(A, filename, comments=None, opener=Path.open):
         format=fmt_string,
         size=typesize[0],
         type=_ss_typenames[matrix_type[0]],
-        iso=is_iso[0],
-        jumbled=is_jumbled[0],
+        iso=int(is_iso[0]),
         comments=comments,
     )
     header_content = header_template.format(**vars)
@@ -276,7 +274,6 @@ def binwrite(A, filename, comments=None, opener=Path.open):
         fwrite(buff(typecode, sizeof("int32_t")))
         fwrite(buff(typesize, sizeof("size_t")))
         fwrite(buff(is_iso, sizeof("bool")))
-        fwrite(buff(is_jumbled, sizeof("bool")))
 
         if is_hyper:
             Ap_size[0] = (nvec[0] + 1) * Isize
@@ -406,7 +403,7 @@ def binread(filename, opener=Path.open):
         typecode = frombuff("int32_t*", fread(sizeof("int32_t")))
         typesize = frombuff("size_t*", fread(sizeof("size_t")))
         is_iso = frombuff("bool*", fread(sizeof("bool")))
-        is_jumbled = frombuff("bool*", fread(sizeof("bool")))
+        is_jumbled = ffi.new("bool*", 0)
 
         by_row = format[0] == lib.GxB_BY_ROW
         by_col = format[0] == lib.GxB_BY_COL