verify: avoid tabs in check-system-info

pycodestyle has a longstanding bug/limitation whereby tabs inside of
triple-quote strings are counted as W191 ("indentation contains tabs").

  PyCQA/pycodestyle#45

Strictly speaking, that's not a violation of PEP8, but as several
commentators note, using tabs inside of string literals means that, if
your editor doesn't show the distinction, it might not be clear what the
intent is.

Let's avoid both problems and use \t instead.

test/verify/check-system-info

@@ -50,32 +50,32 @@ SMBIOS 2.7 present.
 
 Handle 0x0008, DMI type 17, 34 bytes
 Memory Device
-	Total Width: 64 bits
-	Size: 8192 MB
-	Form Factor: SODIMM
-	Locator: ChannelA-DIMM0
-	Bank Locator: BANK 0
-	Type: DDR3
-	Speed: 1600 MT/s
-	Manufacturer: Samsung
-	Asset Tag: None
-	Rank: Unknown
-	Configured Memory Speed: 1600 MT/s
+\tTotal Width: 64 bits
+\tSize: 8192 MB
+\tForm Factor: SODIMM
+\tLocator: ChannelA-DIMM0
+\tBank Locator: BANK 0
+\tType: DDR3
+\tSpeed: 1600 MT/s
+\tManufacturer: Samsung
+\tAsset Tag: None
+\tRank: Unknown
+\tConfigured Memory Speed: 1600 MT/s
 
 Handle 0x0009, DMI type 17, 34 bytes
 Memory Device
-	Total Width: 64 bits
-	Size: 8192 MB
-	Form Factor: SODIMM
-	Locator: ChannelB-DIMM0
-	Bank Locator: BANK 2
-	Memory technology: Awesome
-	Type: DDR3
-	Speed: 1600 MT/s
-	Manufacturer: Samsung
-	Asset Tag: None
-	Rank: 1
-	Configured Memory Speed: 1600 MT/s
+\tTotal Width: 64 bits
+\tSize: 8192 MB
+\tForm Factor: SODIMM
+\tLocator: ChannelB-DIMM0
+\tBank Locator: BANK 2
+\tMemory technology: Awesome
+\tType: DDR3
+\tSpeed: 1600 MT/s
+\tManufacturer: Samsung
+\tAsset Tag: None
+\tRank: 1
+\tConfigured Memory Speed: 1600 MT/s
 EOF
 """