Fix multi-line string literal.

Author: bl0x

nmigen_boards/cmod_a7.py

@@ -59,10 +59,12 @@ class _CmodA7Platform(Xilinx7SeriesPlatform):
         # Pin 24/25 are VCC and GND
         # Pin 15/16 are analog (XADC)
         Connector("gpio", 0,
-                " M3  L3 A16  K3 C15  H1 A15 B15 A14  J3  J1  K2
-                  L1  L2   -   -  M1  M3  P3  M2  N1  N2  P1   -
-                   -  R3  T3  R2  T1  T2  U1  W2  V2  W3  V3  W5
-                  V4  U4  V5  W4  U5  U2  W6  U3  U7  W7  U8  V8"),
+            """
+            M3  L3 A16  K3 C15  H1 A15 B15 A14  J3  J1  K2
+            L1  L2   -   -  M1  M3  P3  M2  N1  N2  P1   -
+             -  R3  T3  R2  T1  T2  U1  W2  V2  W3  V3  W5
+            V4  U4  V5  W4  U5  U2  W6  U3  U7  W7  U8  V8
+            """),
 
         Connector("xadc", 0, {
             "vaux4_n":   "G2",