libsel4vka: Put whitespace in-between adjacent string literals.

Later C++ standards interpret characters immediately adjacent to a string
literal to be an encoding modifier (similar to unicode literals). This commit
inserts whitespace to avoid this ambiguity. It should have no effect when
compiling under standards without this interpretation.

libsel4vka/include/vka/cspacepath_t.h

diff --git a/libsel4vka/include/vka/cspacepath_t.h b/libsel4vka/include/vka/cspacepath_t.h
index cb46696..3f1cefb 100644
--- a/libsel4vka/include/vka/cspacepath_t.h
+++ b/libsel4vka/include/vka/cspacepath_t.h
@@ -95,13 +95,13 @@
 inline static void cspacepath_t_print(const cspacepath_t* src)
 {
     (void)(src);
-    CSPACEPATHPRINT("capPtr:     0x%"PRIx32"\n", src->capPtr);
-    CSPACEPATHPRINT("capDepth:   0x%"PRIx32"\n", src->capDepth);
-    CSPACEPATHPRINT("root:       0x%"PRIx32"\n", src->root);
-    CSPACEPATHPRINT("dest:       0x%"PRIx32"\n", src->dest);
-    CSPACEPATHPRINT("destDepth:  0x%"PRIx32"\n", src->destDepth);
-    CSPACEPATHPRINT("offset:     0x%"PRIx32"\n", src->offset);
-    CSPACEPATHPRINT("window:     0x%"PRIx32"\n", src->window);
+    CSPACEPATHPRINT("capPtr:     0x%" PRIx32 "\n", src->capPtr);
+    CSPACEPATHPRINT("capDepth:   0x%" PRIx32 "\n", src->capDepth);
+    CSPACEPATHPRINT("root:       0x%" PRIx32 "\n", src->root);
+    CSPACEPATHPRINT("dest:       0x%" PRIx32 "\n", src->dest);
+    CSPACEPATHPRINT("destDepth:  0x%" PRIx32 "\n", src->destDepth);
+    CSPACEPATHPRINT("offset:     0x%" PRIx32 "\n", src->offset);
+    CSPACEPATHPRINT("window:     0x%" PRIx32 "\n", src->window);
 }
 
 #endif /* _CSPACEPATH_T_H_ */