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This is what I got with Visual Studio 2013:
[ RUN      ] Core_InputOutput.FileStorage_DMatch
C:\opencv\modules\core\test\test_io.cpp(1117): error:       Expected: fs_result.c_str()
      Which is: "%YAML:1.0\n---\nd: [ 1, 2, 3, -1.5000000000000000e+000 ]\n"
To be equal to: "%YAML:1.0\n---\nd: [ 1, 2, 3, -1.5000000000000000e+00 ]\n"
With diff:
@@ -1,3 +1,3 @@
 %YAML:1.0
 ---
-d: [ 1, 2, 3, -1.5000000000000000e+000 ]\n
+d: [ 1, 2, 3, -1.5000000000000000e+00 ]\n

[  FAILED  ] Core_InputOutput.FileStorage_DMatch (1 ms)
[ RUN      ] Core_InputOutput.FileStorage_DMatch_vector
C:\opencv\modules\core\test\test_io.cpp(1158): error:       Expected: fs_result.c_str()
      Which is: "%YAML:1.0\n---\ndv: [ 1, 2, 3, -1.5000000000000000e+000, 2, 3, 4,\n    1.5000000000000000e+000, 3, 2, 1, 5.0000000000000000e-001 ]\n"
To be equal to: "%YAML:1.0\n" "---\n" "dv: [ 1, 2, 3, -1.5000000000000000e+00, 2, 3, 4, 1.5000000000000000e+00,\n" "    3, 2, 1, 5.0000000000000000e-01 ]\n"
      Which is: "%YAML:1.0\n---\ndv: [ 1, 2, 3, -1.5000000000000000e+00, 2, 3, 4, 1.5000000000000000e+00,\n    3, 2, 1, 5.0000000000000000e-01 ]\n"
With diff:
@@ -1,4 +1,4 @@
 %YAML:1.0
 ---
-dv: [ 1, 2, 3, -1.5000000000000000e+000, 2, 3, 4,
-    1.5000000000000000e+000, 3, 2, 1, 5.0000000000000000e-001 ]\n
+dv: [ 1, 2, 3, -1.5000000000000000e+00, 2, 3, 4, 1.5000000000000000e+00,
+    3, 2, 1, 5.0000000000000000e-01 ]\n

[  FAILED  ] Core_InputOutput.FileStorage_DMatch_vector (0 ms)
[ RUN      ] Core_InputOutput.FileStorage_DMatch_vector_vector
C:\opencv\modules\core\test\test_io.cpp(1216): error:       Expected: fs_result.c_str()
      Which is: "%YAML:1.0\n---\ndvv:\n   - [ 1, 2, 3, -1.5000000000000000e+000, 2, 3, 4,\n       1.5000000000000000e+000, 3, 2, 1, 5.0000000000000000e-001 ]\n   - [ 3, 2, 1, 5.0000000000000000e-001, 1, 2, 3,\n       -1.5000000000000000e+000 ]\n"
To be equal to: "%YAML:1.0\n" "---\n" "dvv:\n" "   - [ 1, 2, 3, -1.5000000000000000e+00, 2, 3, 4, 1.5000000000000000e+00,\n" "       3, 2, 1, 5.0000000000000000e-01 ]\n" "   - [ 3, 2, 1, 5.0000000000000000e-01, 1, 2, 3, -1.5000000000000000e+00 ]\n"
      Which is: "%YAML:1.0\n---\ndvv:\n   - [ 1, 2, 3, -1.5000000000000000e+00, 2, 3, 4, 1.5000000000000000e+00,\n       3, 2, 1, 5.0000000000000000e-01 ]\n   - [ 3, 2, 1, 5.0000000000000000e-01, 1, 2, 3, -1.5000000000000000e+00 ]\n"
With diff:
@@ -2,6 +2,5 @@
 ---
 dvv:
-   - [ 1, 2, 3, -1.5000000000000000e+000, 2, 3, 4,
-       1.5000000000000000e+000, 3, 2, 1, 5.0000000000000000e-001 ]
-   - [ 3, 2, 1, 5.0000000000000000e-001, 1, 2, 3,
-       -1.5000000000000000e+000 ]\n
+   - [ 1, 2, 3, -1.5000000000000000e+00, 2, 3, 4, 1.5000000000000000e+00,
+       3, 2, 1, 5.0000000000000000e-01 ]
+   - [ 3, 2, 1, 5.0000000000000000e-01, 1, 2, 3, -1.5000000000000000e+00 ]\n

[  FAILED  ] Core_InputOutput.FileStorage_DMatch_vector_vector (1 ms)
Looks like it is only since Visual Studio 2015 the exponent is printed correctly: