add test for reading .ele files

Author: j-fu

src/io.jl

@@ -55,7 +55,7 @@ $(TYPEDSIGNATURES)
      - format version 2.1: shortened version only with cells, cellnodes, cellregions, bfacenodes, bfaceregions
      - format version 2.2: like 2.1, but additional info on cell and node partitioning. Edge partitioning
        is not  stored in the file and may be re-established by [`induce_edge_partitioning!`](@ref).
-  - "*.ele": TetGen output file (requires presence of *.node and *.face file)
+  - "*.ele": TetGen output format (requires presence of *.ele, *.node and *.face file)
   - "*.geo": gmsh geometry description (requires `using Gmsh`)
   - "*.msh": gmsh mesh (requires `using Gmsh`)
   - "*.dom": WIAS-TeSCA dom format

test/cube.1.edge

@@ -0,0 +1,50 @@
+48  1
+    0     22    42  -1
+    1     15    66  -1
+    2      6    41  -1
+    3     57   130  -1
+    4      5    74  -1
+    5     25   150  -1
+    6      1    83  -1
+    7      0   126  -1
+    8     38     6  -1
+    9     21    38  -1
+   10     16   112  -1
+   11      3   129  -1
+   12      3   154  -1
+   13     39    75  -1
+   14      7    82  -1
+   15     11   114  -1
+   16      4   149  -1
+   17     23   139  -1
+   18     17    87  -1
+   19      2   117  -1
+   20     19    51  -1
+   21      1    72  -1
+   22      2    98  -1
+   23     20    76  -1
+   24     41    19  -1
+   25     42     6  -1
+   26     51     7  -1
+   27      4   134  -1
+   28     66     7  -1
+   29     72    25  -1
+   30     74    22  -1
+   31     75     3  -1
+   32     76     4  -1
+   33     82    20  -1
+   34     83    57  -1
+   35     87     1  -1
+   36     98    39  -1
+   37    112     0  -1
+   38    114     0  -1
+   39    117    21  -1
+   40    126    17  -1
+   41    129    15  -1
+   42    130     2  -1
+   43    134    16  -1
+   44    139     5  -1
+   45    149    23  -1
+   46    150     5  -1
+   47    154    11  -1
+# Generated by /home/fuhrmann/Wias/work/tetgen/codeberg/TestingDrafts/src/../tetgen-v161/build/tetgen -pqa0.005 /home/fuhrmann/Wias/work/tetgen/codeberg/TestingDrafts/src/../quarry/cube.smesh