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minor fixes

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Original file line number	Diff line number	Diff line change
`@@ -185,21 +185,21 @@ There are two ways to do so:`
`185`	`185`	`alert( num.toFixed(5) ); // "12.34000", added zeroes to make exactly 5 digits`
`186`	`186`	```
`187`	`187`
`188`		- We can convert it to a number using the unary plus or a `Number()` call: `+num.toFixed(5)`.
	`188`	+ We can convert it to a number using the unary plus or a `Number()` call, e.g write `+num.toFixed(5)`.
`189`	`189`
`190`	`190`	`## Imprecise calculations`
`191`	`191`
`192`	`192`	`Internally, a number is represented in 64-bit format [IEEE-754](https://en.wikipedia.org/wiki/IEEE_754-2008_revision), so there are exactly 64 bits to store a number: 52 of them are used to store the digits, 11 of them store the position of the decimal point (they are zero for integer numbers), and 1 bit is for the sign.`
`193`	`193`
`194`		`-If a number is too big, it would overflow the 64-bit storage, potentially giving an infinity:`
	`194`	+If a number is really huge, it may overflow the 64-bit storage and become a special numeric value `Infinity`:
`195`	`195`
`196`	`196`	```js run
`197`	`197`	`alert( 1e500 ); // Infinity`
`198`	`198`	```
`199`	`199`
`200`	`200`	`What may be a little less obvious, but happens quite often, is the loss of precision.`
`201`	`201`
`202`		`-Consider this (falsy!) test:`
	`202`	`+Consider this (falsy!) equality test:`
`203`	`203`
`204`	`204`	```js run
`205`	`205`	`alert( 0.1 + 0.2 == 0.3 ); // !false/!`

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